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Author SHA1 Message Date
Richard Smith 2b4fa5348e For P0784R7: compute whether a variable has constant destruction if it 
has a constexpr destructor.

For constexpr variables, reject if the variable does not have constant
destruction. In all cases, do not emit runtime calls to the destructor
for variables with constant destruction.

llvm-svn: 373159
 2019-09-29 05:08:46 +00:00
Kristina Brooks 7349d90b74 [CodeGen][CXX]: Fix no_destroy CG bug under specific circumstances 
Summary:

Class with no user-defined destructor that has an inherited member that has a
non-trivial destructor and a non-default constructor will attempt to emit a
destructor despite being marked as __attribute((no_destroy)) in which case it
would trigger an assertion due to an incorrect assumption. 

In addition this adds missing test coverage for IR generation for no_destroy.

(Note that here use of no_destroy is synonymous with its global flag 
counterpart `-fno-c++-static-destructors` being enabled)

Differential Revision: https://reviews.llvm.org/D54344

llvm-svn: 346628
 2018-11-12 01:19:16 +00:00